Your header lift switch has five wires leading to it. One red one and four white ones with tracers.The red one supplies power to the switch any time there is engine oil pressure. So there is always power to the center of the switch when the engine is running. Depending on which part of the switch is depressed, there will be 12 volts supplied to one of the four white wires. If the switch is bad, none of the four wires will power up, or more than one will power up. To check it, you will need an ohmmeter or test light. Good luck.